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A kind of preparation method of white light LED chip

A technology of LED chips and white light, which is applied in semiconductor/solid-state device manufacturing, semiconductor/solid-state device testing/measurement, semiconductor devices, etc., can solve problems such as white light LED chip light spots, improve brightness, ensure consistency, and solve color zones The effect of deviation

Active Publication Date: 2020-02-14
JIANGXI LATTICEBRIGHT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the above problems, the object of the present invention is to provide a method for preparing a white LED chip, which solves the spot problem of the existing white LED chip

Method used

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  • A kind of preparation method of white light LED chip

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Embodiment Construction

[0024] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments.

[0025] Such as figure 1 Shown is a schematic flow chart of the preparation method of the white light LED chip provided by the present invention. It can be seen from the figure that the preparation method includes: S1 spot-testing each LED chip on the wafer; S2 cutting the wafer to obtain a single S3 refers to the spot measurement data to sort the cut LED chips to obtain square chips with different parameters; S4 coats the LED chips on different square chips after sorting with silica gel mixed with phosphor powder; S5 cuts Square slices are used to obtain white light LED chips.

[0026] More specifically, in step S1, after performing point measurement on each LED chip on the wafer under a certain current and archiving the point measurement data, ...

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Abstract

The invention provides a preparation method of white-light LED chips. The method includes: performing point measurement on LED chips on a wafer; cutting the wafer to obtain single LED chips; sorting the cut LED chips in reference to point measurement data to obtain square pieces of various different parameters; coating the LED chips on different square pieces after sorting with silica gel mixed with fluorescent powder; and cutting the square pieces to obtain the white-light LED chips. According to the method, the consistency of the color temperature of the white-light LED chips of the same square piece is guaranteed, and problems of color zone deviation and light spots etc. due to wavelength difference of the prepared white-light LED chips are effectively solved.

Description

technical field [0001] The invention belongs to the field of semiconductors, and in particular relates to a preparation method of a white light LED chip. Background technique [0002] LED (Light Emitting Diode, light-emitting diode) lamps have developed rapidly due to their advantages such as fast response, good shock resistance, long life, energy saving and environmental protection, and have gradually replaced traditional incandescent lamps and energy-saving lamps, becoming a new generation of energy-saving lighting. It is widely used in landscaping and indoor and outdoor lighting and other fields. [0003] At present, the traditional white light bead process is: coating phosphor powder on the surface of the blue light chip, so that the blue light emitted by the blue light chip excites the phosphor powder to emit yellow light or green light or red light or a mixed light of multiple colors. The excited light mixes together to form white light. However, the traditional pack...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50H01L21/60
CPCH01L22/12H01L33/50H01L2933/0041
Inventor 江柳杨
Owner JIANGXI LATTICEBRIGHT